140. Solving a chemistry problem

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12. A solution of potassium dichromate with a volume of V ml was titrated with iron (II) ions generated at a current I A for a time t min, the end of the reaction was recorded according to photometric data:
Option 1
V, ml 20.00
I, A 0.200
t, min 15.0
Determine the molar concentration of the K2Cr2O7 equivalent
(feq = 1/6).

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